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MACH® Series
Gas-Fired Boiler Maintenance
Page 31
5.1.4 Semi-Annually (every 6 months)
In addition to the recommended monthly service:
1. Clean burner of any accumulated dust or lint. See
Section 5.2 on "Cleaning the Burner."
2. Inspect burner for any signs of deterioration or
corrosion. Replace immediately if deterioration or
corrosion is evident.
Installation and service must be performed by a
qualified installer or service agency who has been
trained on the Patterson-Kelley MACH boiler.
The blower motor is permanently lubricated and does
not require periodic lubrication.
5.1.5 Annually
In addition to the recommended monthly service:
1. Inspect and clean the inlet screen of any
accumulated dust or lint.
2. Check burner and clean off any soot or foreign
material that may have accumulated. See Section
5.2 on "Cleaning the Burner." Check for corrosion
of the burner and its parts. If there is evidence of
deterioration or corrosion, replace immediately.
3. Inspect combustion chamber when the burner is
removed for inspection. Note any signs of
deterioration. Clean as necessary.
4. Inspect and clean heat exchanger. Use vacuum to
remove accumulations from the heat exchanger
pins and surfaces. Clean the casting pins by
flushing with clean water and air drying. Do not
use any cleaning agents or solvents. A soft nylon
brush may be used in accessible areas.
5. Drain and flush the inside of the heat exchanger as
required (separate from system flush).
6. Examine the venting system at least once a year.
Refer to the vent manufacturer's instructions for
requirements in addition to those listed below.
a. Check all joints and pipe connections for
tightness.
b. Check pipe for corrosion or deterioration. If
any piping needs replacing, do so
immediately.
7. Qualified service personnel should thoroughly
inspect the heating system and correct any
problems prior to re-starting the boiler.
8. Perform combustion analysis and readjust to
manufacturer's specifications as necessary. It is
recommended that a copy of this report is filed for
future reference.
9. Perform a leak test of the gas valves in accordance
with the manufacturer's instructions.
Installation and service must be performed by a
qualified installer or service agency who has been
trained on the Patterson-Kelley MACH boiler.
5.2
CLEANING THE BURNER
1. Lockout and tagout gas supply to the boiler.
2. Lockout and tagout electrical power to the boiler.
3. Remove the top cover of the boiler.
4. Disconnect the electrical connections to the blower
and gas safety shut off / control valves.
5. Unbolt burner hood and remove the gas train
assembly.
6. Carefully remove the burner. Use low pressure air
to remove any dust or lint from the burner. Using
a soft clean cloth, wipe the inside surface of the
burner. DO NOT wipe the mesh side (flame side)
of the burner.
5.3
AFTER ALL REPAIRS OR MAINTENANCE
1. Follow "Pre-Start Check List" (Section 3.10) and
all "Safety Checks" (Section 3.11).
2. Check gas pressure. (Section 3.12.2.)
3. Perform combustion check. Adjust gas flow if
necessary. (Section 3.12.4.).